Hydraulic oil-well washer.



A. T. IERGLNS.

HYDRAULIC ULL WELL WASHER'.

APPLICAUON FILED MAR,14.1918.

Patented Aug. 20,A w18.

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Ulitlilll@ STATES @hlldltl ANDREW T. JERGINS, OF LOS ANGELES, CALIFORNIA.

HYDRAULIC OIL-WELL WASHER.

Application filed March 14, 1918.

To all 'whom it may concern.'

Be it linown that I, ANDREW 'l'. JERGINS, a citizen of the United States, residing at Los Angeles7 in the county ol Los Angeles and State of California, have invented new and useful Improvements in l-ydraulic Oil,-\Vell llf'ashers, of which the following is a speciication.

My object is to malte an improved oil well washer and my invention consists in the novel features herein shown7 described and claimed.

Figure 1 is a fragmentary diametrical vertical sectional detail showing an oil well washer embodying the principles of my invention in operation in an oil well.

Fig. 2 is a view analogous to Fig. 1 and showing a modified construction.

F ig. 3 is a view analogous t-o Fig. 1 and showing a modiiied form ot packer.

Fig. et is a perspective of the packer shown in Figs. 1 and Fig. 5 is a perspective ot' the bit in Fig. 1.

F ig. G is a perspective ot a modified forni et bit.

The well casing- 1 is sunk into the oil well bore Q, and at the point where the casing passes through the oil bearing sand 3 the casing has pericorations i for admitting the oil from the sand 3 through the perforations into the casing. In actual practice the casing 1 becomes clogged with paraliin and asphalt until the oil will not flow readily through the perforations 4, and it is the object of my invention to provide a device for cleaning the casing and restoring the flow of oil.

The washer tubular stem 5 is considerably smaller in diameter than the casing 1. A pipe coupling 6 is lined upon the lower end o't` the tube 5, a section 7 ot tubing similar to the tube 5 is inserted into the lower end of the coupling 6, a second coupling 8 is placed upon the lower end ot the section 7, and a bushing 9 is inserted into the lower end of the second coupling. A fish-tail bit 10 has a. stem 11 extending upwardly loosely through the bushing 9. A bearing plate 12 is :inserted downwardly through the tube section 7 against the bushing 9, a ball retainer 13 is placed upon the plate 1'?. and carries bearing balls 14, a second plate 15 is placed upon the balls 1-1, and packing 1G shown is inserted downwardly7 against the plate 15.

rllhe coupling 6 is of considerable length Specification of Letters Patent.

Patented Aug. 29, 1918.

Serial No. 222,461.

and the water motor 1T is fixed in the coupling G between the ends of the stem 5 and section 7, said water motor having an intake 1S andan outlet 19. The rotating shaft 20 of the water motor extends some distance below the casing of the motor and a rotating head :21 is iixed or formed integral with the lower end ot the shaft. The rotating head 21 is screwed upon the upper end of the stem 11 against the packing 1G. Ports 22 and 23 lead from the chamber 24 between the motor 17 and the head 2l to the port 25 leading through the stein 11 and from the lower end of the port ports 2G and 27 lead through the blades and Q0 of the bit 10, said ports discharging from the blades behind the cutting' edges 30 and 31, so that the discharge of water assists in lrotating the bit. The cutting edges 30 and 31 upon the bit 10 are vertical and parallel and lit closely wit-hin the casing 1.

The packer 32 comprises an internally screw-threaded band 33 and ieXible overlapping segments 34; extending downwardly from the band. The yband 33 is screwseatedv upon external screwthreads 35 formed upon the coupling 6 and the flexible segments 34 press outwardly against the inner face of the casing 1 so as to form a tight joint between the washer and the casing. rl`he lower edges 36 of the segments 34 are rounded inwardly so that the packer will slide up and down in the casing.

In the practical operation of the washer shown in F i g. 1 wate-r is forced downwardly through the tubular stem 5 and passes through the watermotor 17thereby rotating the stein 2O and the bit 10 is correspondingly rotated. As the washer moves downwardly in the casing 1 the bit 10 will scrape the paraliin, asphalt and the like from the 'inner face of the casing 1. The water which passes through the motor 17 will pass downwardly and ultimately be discharged through the ports 26 and 27 to' assist in rotating the bit, and this water will pass upwardly outside of the coupling 8 aga-inst the packer 32and then will be forced outwardly through the perforations in the casing 1, and continued operation will force the water upwardly through the sand 3"around the plane of the packer 32 and then in through the perforations in the casing and upwardly outside of the stem 5. In this way the casing 1 may be cleaned, the perforations in the casing washed out, and the sand 

